万红霞, 卢燃, 蔡文丽, 宋东东. P110钢级套管在低硫环境中的腐蚀行为[J]. 中国腐蚀与防护学报, 10.11902/1005.4537.2026.165.
Hong-Xia Wan, Ran Lu, Wen-li Cai, Dong-dong Song. Corrosion Behavior of P110 Grade Steel Casing in Low-Sulfur Environments[J]. Journal of Chinese Society for Corrosion and protection, 0, (): 0-.

摘要 相关文章 Metrics 全文: PDF(1173 KB)   摘要: P110钢广泛应用于油气开采领域中，常服役于含CO2、H2S和 Cl- 等腐蚀环境，其中H2S气体是造成油套管失效的关键成分。一般认为井底高温高压区域腐蚀最为严重，井口环境中H2S含量一般较低，但是实际工况下也存在井口处腐蚀更为严重的现象。因此，为探究P110钢在井口低硫环境中的腐蚀行为，在60 ℃条件下，以不同浓度（0.001，0.01，0.05，0.1，0.2 mol/L） Na₂S 溶液模拟低含硫腐蚀环境。结果表明，随着Na2S溶液浓度的升高，阻抗模值呈先增大后减小的趋势，而腐蚀电流密度则表现为先减小后增大的规律。浸泡实验结果显示， P110钢的腐蚀速率随Na2S浓度升高呈现先降低后小幅上升的趋势；微观形貌分析表明，置于0.001 mol/L的Na2S溶液中的试样点蚀现象严重，随浓度升高，试样表面腐蚀均匀，可以看到清晰的划痕，局部形成浅小型点蚀坑，整体腐蚀程度较轻。产生上述现象的主要原因是体系溶解氧含量下降，导致阴极反应的由吸氧反应转变为析氢反应。该研究可为油气井 P110 钢油套管的防腐设计与安全服役提供理论支撑。 关键词 ： P110钢,  低硫环境,  点蚀,  阴极反应     Abstract：P110 steel is widely used in the oil and gas extraction industry, where it is frequently exposed to corrosive environments containing CO₂, H₂S, and Cl⁻. Among these, H₂S gas is a key factor contributing to the failure of oil casing. H₂S readily causes corrosion, perforation, and sulfur-induced blockages in oil casing. It is generally believed that corrosion is most severe in the high-temperature, high-pressure zones at the bottom of the well, while H₂S concentrations are typically lower at the wellhead. However, in actual operating conditions, more severe corrosion has also been observed at the wellhead. Therefore, to investigate the corrosion behavior of P110 steel in low-sulfur environments at the wellhead, low-sulfur corrosion environments were simulated using Na₂S solutions of different concentrations (0.001, 0.01, 0.05, 0.1, and 0.2 mol/L) at 60 °C. The results indicate that as the concentration of the Na₂S solution increases, the impedance modulus first increases and then decreases, while the corrosion current density first decreases and then increases. Immersion test results show that the corrosion rate of P110 steel first decreases and then rises slightly as the Na₂S concentration increases; Microstructural analysis revealed that specimens immersed in 0.001 mol/L Na₂S solution exhibited severe pitting corrosion. As the concentration increased, the corrosion on the specimen surface became more uniform, with clear scratches visible and the formation of shallow, small pitting pits in localized areas, resulting in overall milder corrosion. These phenomena are primarily attributed to the change of cathodic reaction from oxygen absorption reaction to hydrogen evolution reaction and the oxygen content within the system. This study provides theoretical support for the corrosion protection design and safe service of P110 steel casing in oil and gas wells. Key words： P110 steel    low-sulfur environment    pitting corrosion    cathodic reaction 收稿日期: 2026-05-28      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 万红霞 卢燃 蔡文丽 宋东东 44.8K 链接本文: https://www.jcscp.org/CN/10.11902/1005.4537.2026.165      或      https://www.jcscp.org/CN/Y0/V/I/0 [1] 陆海峰, 缪强, 梁文萍, 姚志猛, 魏少翀, 陈国星. 激光清洗对不锈钢表面耐腐蚀性能的影响[J]. 中国腐蚀与防护学报, 2026, 46(4): 1227-1237. [2] 陈旭, 刘宇航, 郭建, 王岐山, 刘畅, 刘彬. 超级13Cr不锈钢在饱和CO2 油田采出液中的缝隙腐蚀行为[J]. 中国腐蚀与防护学报, 2026, 46(2): 523-532. [3] 谷清宇, 宋雁飞, 张亮亮, 王楠, 雷晓维. 激光定向能量沉积17-4PH不锈钢钝化与点蚀行为研究[J]. 中国腐蚀与防护学报, 2026, 46(1): 103-114. [4] 洪孝木, 王永强, 李娜, 田凯, 杜娟. 时效处理对马氏体时效硬化不锈钢显微组织和局部腐蚀性能的影响[J]. 中国腐蚀与防护学报, 2024, 44(5): 1285-1294. [5] 杨成, 杨广明, 王建军, 苗学良, 张译, 孙宝壮, 刘智勇. 温度对核电站用42CrMoE低合金钢在硼酸模拟液中腐蚀行为的影响[J]. 中国腐蚀与防护学报, 2024, 44(5): 1345-1352. [6] 麻衡, 田会云, 刘宇茜, 王月香, 何康, 崔中雨, 崔洪芝. S420海工钢在不同海洋区带环境下的腐蚀行为研究[J]. 中国腐蚀与防护学报, 2024, 44(3): 635-644. [7] 邢少华, 彭文山, 钱峣, 李相波, 马力, 张大磊. 海水流速对经抛光和钝化表面处理的2205不锈钢点蚀的影响[J]. 中国腐蚀与防护学报, 2024, 44(3): 658-668. [8] 张成龙, 张斌, 朱敏, 袁永锋, 郭绍义, 尹思敏. CoCrNi中熵合金在不同浓度NH4Cl溶液中的腐蚀行为研究[J]. 中国腐蚀与防护学报, 2024, 44(3): 725-734. [9] 凌东, 何坤, 余靓, 董立谨, 张华礼, 李玉飞, 王勤英, 张智. 高温高压CO2 环境中超级13Cr不锈钢点蚀有限元模拟[J]. 中国腐蚀与防护学报, 2024, 44(2): 303-311. [10] 熊伊铭, 梅婉, 王泽华, 余瑞, 徐诗瑶, 吴磊, 张欣. 磁场作用下5083铝合金腐蚀行为研究[J]. 中国腐蚀与防护学报, 2024, 44(1): 229-236. [11] 任万凯, 连洲洋, 周康, 罗正维, 魏无际, 张雪英. 氨法脱硫液成分对304不锈钢局部腐蚀发展阶段影响探究[J]. 中国腐蚀与防护学报, 2023, 43(6): 1392-1398. [12] 刘微. 测量不锈钢电化学噪声的非对称表面方法[J]. 中国腐蚀与防护学报, 2023, 43(5): 1151-1158. [13] 高智悦, 姜波, 樊志彬, 王晓明, 李辛庚, 张振岳. 典型接地材料在碱性土壤模拟液中的腐蚀行为研究[J]. 中国腐蚀与防护学报, 2023, 43(1): 191-196. [14] 包晔峰, 武竹雨, 陈哲, 郭林坡, 王子睿, 曹冲, 宋亓宁. 敏化处理对00Cr21NiMn5Mo2N节镍型双相不锈钢堆焊层耐腐蚀性能的影响[J]. 中国腐蚀与防护学报, 2022, 42(6): 1027-1033. [15] 刘玉项, 徐安阳. AZ91镁合金和MAO涂层的点蚀行为研究[J]. 中国腐蚀与防护学报, 2022, 42(6): 1034-1042. Viewed Full text Abstract Cited   Shared      Discussed